iTNC 530 - TNC 640 - DR. JOHANNES HEIDENHAIN GmbH
iTNC 530 - TNC 640 - DR. JOHANNES HEIDENHAIN GmbH
iTNC 530 - TNC 640 - DR. JOHANNES HEIDENHAIN GmbH
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– Compensating Form Errors of Tools with 3D-ToolComp (Option)<br />
3D-ToolComp is a new and powerful<br />
option for three-dimensional tool radius<br />
compensation. A compensation-value table<br />
is used to defi ne angle-dependent delta<br />
values that describe the tool deviation from<br />
the ideal circular shape (see fi gure).<br />
The <strong>i<strong>TNC</strong></strong> then corrects the radius value<br />
defi ned for the tool’s current point of<br />
contact with the workpiece. In order to<br />
determine the point of contact exactly, the<br />
NC program must be have been created<br />
with surface-normal blocks (LN blocks) by<br />
a CAM system. The surface-normal blocks<br />
specify the theoretical center point of the<br />
radius cutter, and in some cases also the<br />
tool orientation relative to the workpiece<br />
surface.<br />
Ideally, the compensation-value table is<br />
generated fully automatically by way of a<br />
special cycle that uses a laser system to<br />
measure the form of the tool so that the<br />
<strong>i<strong>TNC</strong></strong> can use this table directly. If the form<br />
deviations of the tool used are available<br />
as a calibration chart from the tool<br />
manufacturer, then you can create the<br />
compensation-value table manually.<br />
Z<br />
<strong>DR</strong>2–0.004<br />
<strong>DR</strong>2+0.002<br />
X<br />
11